My point was sleeving is akin to lamimations, laminations are generally 25% stronger. The weekest point of the tubing will generally be at the weld joint on the frame due to the stress riser created by the welld joint. I recommend a gusset there, or one of those super gussets.

we usually sleeve the bars at the top of the halo and then place an upright bar in to support....like where the middle window "petty bar" would be...we then put new bars in place of the dash bar and the one that goes behind the driver...Circle Track magazine had a really good article on sleeving cages and stuff awhile back....what is lamination?

Nono the cage isn't for me... sleeving is fine done it lots 🙂

Laminate means the hardened/smooth surface on the outside of the steel. Like rifled steel (drilled) is stronger then solid.

Umm no laminated means layers like plywood for example, just try an bend a solid piece of wood as far as you can bend plywood and you will understand. Having worked as a heavy equipment mechanic and millwright for 25 years I could show you hundreds of examples where laminated joints are used to reinforce a high stressed area.
I know allot of guys are worried about using cages but if it's done properly there is usually no issues. I've built a few cars and I've also transfered cages and have yet to see a problem.